Android gives you multiple ways to stop unwanted texts without deleting your entire conversation

You can block a contact on Android through your default messaging app, through your carrier, or through a third-party app — each method stops texts from that number in a different way. The simplest route is blocking directly in your Messages app (Google Messages on most newer phones, Samsung Messages on Samsung devices), which hides incoming texts from that contact and prevents them from seeing your read receipts. If someone keeps texting from different numbers, carrier-level blocking through your phone provider stops the texts before they reach your phone at all. Third-party apps like TrueCaller add spam detection on top of blocking, catching unwanted messages you didn't know to block yet.

Blocking someone does not stop them from calling you or reaching you through other apps like WhatsApp or Facebook Messenger — it only affects text messages in your default messaging app. Your past message history with that contact stays in your phone, and you can unblock them anytime to see the conversation again.

Key Takeaways

  • Blocking in your messaging app hides texts from that contact but does not stop them from calling or emailing you.
  • Carrier blocking through your phone provider (AT&T, Verizon, T-Mobile, or others) stops texts before they arrive on your phone.
  • You can block a contact by opening a text thread, tapping the contact name at the top, and selecting Block or Block Contact.
  • Third-party apps like TrueCaller and Samsung's native spam filter can automatically catch spam texts without you manually blocking each number.
  • Blocking someone does not delete past messages — you can unblock and see the conversation history later if needed.

Blocking a contact in your default messaging app

Open the text thread from the person you want to block. Tap their name or number at the top of the conversation. You will see options including Block Contact, Block Number, or Block Sender — the exact wording depends on your phone model and Android version. Tap it, and Android will ask you to confirm. After you confirm, that contact's texts will no longer appear in your inbox, and they will not see read receipts when you open their messages.

On Google Messages (the default on Pixel phones and many others), you can also block by swiping left on a conversation thread and tapping the block icon. On Samsung Messages, long-press the conversation and tap Block. The blocked contact can still call you and send emails — blocking only affects text messages through that app. To unblock someone later, go to your messaging app's settings, find Blocked Contacts or Blocked Numbers, and tap the contact to unblock them. Your message history with that person remains intact.

Blocking through your phone carrier

Your phone provider (AT&T, Verizon, T-Mobile, US Cellular, or others) offers carrier-level blocking that stops texts before they reach your phone. This is useful when someone is texting from multiple numbers or when you want to block at the network level rather than just in your app. Contact your carrier's customer service by phone, through their website, or through their mobile app. Tell them the number you want to block, and they will add it to your account's block list. The process takes a few minutes, and the block usually takes effect within an hour.

Some carriers charge a small monthly fee for this service (typically $2 to $5), while others offer it free. Check your carrier's website or call their support line to confirm pricing and whether they offer it. Carrier blocking is more powerful than app-level blocking because it stops the text at the network level — the message never reaches your phone. However, you cannot see the blocked messages later, and you have to contact your carrier to unblock a number.

Using spam filters and third-party blocking apps

Android phones come with built-in spam detection in the default messaging app. Google Messages automatically flags likely spam and sorts it into a separate Spam folder. Samsung Messages has a similar filter. These filters learn over time and catch many unwanted texts without you having to block each number manually.

If the built-in filter is not catching enough, third-party apps like TrueCaller, Nomorobo, and RoboKiller add extra layers of detection. TrueCaller shows caller ID for unknown numbers and can block spam texts automatically. Nomorobo blocks known spam numbers and lets you report new ones. These apps require you to grant them permission to read and filter your messages, so review their privacy policy before installing. Most third-party blocking apps are free with optional paid versions that add features like call recording or advanced filtering. Install them from the Google Play Store, open the app, and follow the setup steps to enable blocking.

What happens when you block someone

When you block a contact in your messaging app, their texts stop appearing in your inbox when ready. They will not see a notification that they are blocked — their text will straightforward not show a read receipt if they had one enabled. They can still call you, email you, or reach you through other apps like WhatsApp or Facebook Messenger.

If the blocked contact tries to text you, the message goes into a blocked folder (in Google Messages, this is the Spam folder; in Samsung Messages, it is the Blocked folder). You can view these messages anytime by opening that folder, and you can unblock the contact if you change your mind. Unblocking restores the conversation to your main inbox. Blocking does not delete your message history with that contact — if you unblock them later, all past messages remain in the conversation thread.

Blocking multiple numbers or unknown callers

If you are being texted by many different numbers, blocking each one individually is slow. Instead, enable your messaging app's spam filter and consider a third-party app like TrueCaller, which can block entire categories of spam (robocalls, known scam numbers, and marketing texts) at once. You can also block all unknown numbers on Android by going to Settings, then Apps, then Permissions, then Phone, and enabling the option to block unknown callers. This stops calls and texts from any number not in your contacts.

However, this also blocks legitimate calls from businesses, doctors' offices, and services you use, so use it only if you receive very few calls from unknown numbers. If you want to block texts from a specific area code or pattern (like all numbers starting with a certain prefix), most third-party apps let you set up rules. TrueCaller and similar apps let you create custom block lists based on patterns, keywords in the message, or sender type.

Blocking business texts and marketing messages

Marketing texts and alerts from businesses often come from short codes (five- or six-digit numbers) rather than regular phone numbers. Blocking these requires a different approach than blocking a contact. In Google Messages, open the message, tap the three dots at the top right, and select Block & Report Spam. In Samsung Messages, long-press the message and tap Block Sender.

For short codes, you can also reply with the word STOP, which unsubscribes you from that sender's list (this works for most legitimate marketing texts). If a business text is fraudulent or pretends to be from your bank or a service you use, report it to the Federal Trade Commission at ReportFraud.ftc.gov. This helps authorities track scam patterns and take action against the senders.

Frequently Asked Questions

Can someone tell if I blocked them on Android?

No official notification tells them they are blocked. However, if they text you regularly and suddenly stop seeing read receipts, they may suspect it. If they call you, they will hear a normal ring but you will not receive the call, which might also tip them off.

Will blocking someone stop them from calling me?

Blocking in your messaging app only blocks texts. Calls from that contact will still come through to your phone. If you want to block calls as well, you need to block the contact in your Phone app or through your carrier.

What is the difference between blocking and reporting spam?

Blocking stops that specific number from texting you. Reporting spam tells Google or your carrier that the number is spam, which helps them identify patterns and block similar numbers for other users. You can do both at the same time.

Can I block a text without opening the conversation?

Yes. In Google Messages, swipe left on the conversation thread and tap the block icon. In Samsung Messages, long-press the conversation and select Block. You do not need to open the thread first.

If I block someone, can they still see my status or know I am online?

In the default messaging app, blocking only affects text messages. If you both use other apps like WhatsApp or Facebook Messenger, they can still see your status in those apps unless you block them there separately.